refactor(new): standardize project name validation (#4206)

Author: clydin

packages/@angular/cli/commands/init.run.ts

@@ -1,10 +1,10 @@
 import * as chalk from 'chalk';
 import LinkCli from '../tasks/link-cli';
 import NpmInstall from '../tasks/npm-install';
+import { validateProjectName } from '../utilities/validate-project-name';
 
 const Promise = require('../ember-cli/lib/ext/promise');
 const SilentError = require('silent-error');
-const validProjectName = require('../ember-cli/lib/utilities/valid-project-name');
 const normalizeBlueprint = require('../ember-cli/lib/utilities/normalize-blueprint-option');
 const GitInit = require('../tasks/git-init');
 
@@ -73,10 +73,7 @@ export default function initRun(commandOptions: any, rawArgs: string[]) {
     skipTests: commandOptions.skipTests
   };
 
-  if (!validProjectName(packageName)) {
-    return Promise.reject(
-      new SilentError('We currently do not support a name of `' + packageName + '`.'));
-  }
+  validateProjectName(packageName);
 
   blueprintOpts.blueprint = normalizeBlueprint(blueprintOpts.blueprint);
 

packages/@angular/cli/commands/new.ts

@@ -1,27 +1,10 @@
 import * as chalk from 'chalk';
 import InitCommand from './init';
-import {oneLine, stripIndent} from 'common-tags';
+import { validateProjectName } from '../utilities/validate-project-name';
 
 const Command = require('../ember-cli/lib/models/command');
 const Project = require('../ember-cli/lib/models/project');
 const SilentError = require('silent-error');
-const validProjectName = require('../ember-cli/lib/utilities/valid-project-name');
-
-const packageNameRegexp = /^[a-zA-Z][.0-9a-zA-Z]*(-[a-zA-Z][.0-9a-zA-Z]*)*$/;
-
-function getRegExpFailPosition(str: string) {
-  const parts = str.split('-');
-  const matched: string[] = [];
-
-  parts.forEach(part => {
-    if (part.match(packageNameRegexp)) {
-      matched.push(part);
-    }
-  });
-
-  const compare = matched.join('-');
-  return (str !== compare) ? compare.length : null;
-}
 
 const NewCommand = Command.extend({
   name: 'new',
@@ -53,36 +36,14 @@ const NewCommand = Command.extend({
         `The "ng ${this.name}" command requires a name argument to be specified. ` +
         `For more details, use "ng help".`));
     }
-    if (!packageName.match(packageNameRegexp)) {
-      const firstMessage = oneLine`
-        Project name "${packageName}" is not valid. New project names must
-        start with a letter, and must contain only alphanumeric characters or dashes.
-        When adding a dash the segment after the dash must start with a letter too.
-      `;
-      const msg = stripIndent`
-        ${firstMessage}
-        ${packageName}
-        ${Array(getRegExpFailPosition(packageName) + 1).join(' ') + '^'}
-      `;
-      return Promise.reject(new SilentError(msg));
-    }
+
+    validateProjectName(packageName);
 
     commandOptions.name = packageName;
     if (commandOptions.dryRun) {
       commandOptions.skipGit = true;
     }
 
-    if (packageName === '.') {
-      return Promise.reject(new SilentError(
-        `Trying to generate an application structure in this directory? Use "ng init" ` +
-        `instead.`));
-    }
-
-    if (!validProjectName(packageName)) {
-      return Promise.reject(
-        new SilentError(`We currently do not support a name of "${packageName}".`));
-    }
-
     if (!commandOptions.directory) {
       commandOptions.directory = packageName;
     }

packages/@angular/cli/ember-cli/lib/utilities/valid-project-name.js

@@ -0,0 +1,40 @@
+import {oneLine, stripIndent} from 'common-tags';
+
+const SilentError = require('silent-error');
+
+const projectNameRegexp = /^[a-zA-Z][.0-9a-zA-Z]*(-[a-zA-Z][.0-9a-zA-Z]*)*$/;
+const unsupportedProjectNames = ['test', 'ember', 'ember-cli', 'vendor', 'app'];
+
+function getRegExpFailPosition(str: string): number | null {
+  const parts = str.split('-');
+  const matched: string[] = [];
+
+  parts.forEach(part => {
+    if (part.match(projectNameRegexp)) {
+      matched.push(part);
+    }
+  });
+
+  const compare = matched.join('-');
+  return (str !== compare) ? compare.length : null;
+}
+
+export function validateProjectName(projectName: string) {
+  const errorIndex = getRegExpFailPosition(projectName);
+  if (errorIndex !== null) {
+    const firstMessage = oneLine`
+      Project name "${projectName}" is not valid. New project names must
+      start with a letter, and must contain only alphanumeric characters or dashes.
+      When adding a dash the segment after the dash must also start with a letter.
+    `;
+    const msg = stripIndent`
+      ${firstMessage}
+      ${projectName}
+      ${Array(errorIndex + 1).join(' ') + '^'}
+    `;
+    throw new SilentError(msg);
+  } else if (unsupportedProjectNames.indexOf(projectName) !== -1) {
+    throw new SilentError(`Project name "${projectName}" is not a supported name.`);
+  }
+
+}